Copper coil water heater construction



Oct. 13, 1931. H. HOWELL COPPER COIL WATER HEATER CONSTRUCTION FiledNov. 11, 1930 Invenlor Q By 2mm A llomey Patented Oct. 13, 1931 HARRYHOWELL, or gunman, 02110 corrna COIL WATER HEATER consrncc'fionApplication filed November 11, 1 930. Serial No. 494,978.

This invention relates broadly to water heaters, and has more particularreference to that type of water heater including a double copper coilthrough which the water to be 5 heated is conducted.

A primary object of the present invention is to provide suitable meanswhereby, by taking advantage of the resiliency in the coil, to eitherlengthen or shorten the distance between the top and bottom connectionsof the coil as may be required, the coil may be shortened or lengthened,for coupling with the conduit pipes leading to and from the boilerwithout the necessity of removing the coil and at the same timecompensate for the expansion and contraction as occasioned from the hotand cold water circulating through the coils, and the conduit pipesassociated therewith.

1 iii} Other objects and advantages of the invention will becomeapparent during a study of the following description taken in connectionwith the accompanying drawings, wherein Figure 1 is an elevational viewof a heater 7 embodying the features of my invention.

Fig. 2 is a longitudinal sectional view therethrough, taken atsubstantially right angles to Fig. 1.

Fig. 3 is a top plan view from the heater casing, the heater coils beingremoved.

With reference more in detail to the drawings, it will be seen that Ihave shown a conventional type of water heater including the usualjacket or casing 5, having the double copper water circulating coils 6mounted therein, and suitably arranged in the bottom of the jacket orcasing 5 is the conventional valve controlled burner 7 As comprehendedby the present invention, the uppermost convolutes of the inner andouter coils of the double heating coil terminate in an upwardly directedmanifold or coil coupling 8 communicating with the inner and outercoils. The manifold 8 extends upwardly through a notch'14 in the topwall of the casing, and at its upper extended end is threaded forthreaded engage ment with the lower end of a pipe (not shown), whichleads to the top of the water 9 boiler (not shown).

"fold 9 and bears against the plate 12 for norten ding through the notch14 and adapted for The lowermost con'volutes of the inner and outerco1ls,-anjd aswell known intheart, are

in communication w'ith'a manifold 9, which intake manifold 9' extendsthrough an opening 10 in the'wall of the casinggandjat, its

'outerextending intake end, the manifold 9 is threaded asat 11 forthreaded engagement with the water feed pipe (not shown).

As further comprehendedby' the ini'ention the opening 10 through whichthe intake of the manifold 9 extends, is ofgreater diamater than saidintake, ,to permit freedom of movement Verticallythrough the opening10.'For normally closing the slot or opening 10,

there isprovided a rectangular plate 12, provided intermediate its upperand lower ends with a suitable openingfor accommodating theextended-threaded end of the manifold 9.

A nut 13 is threaded on the end of the ma1iimally retainingthe plate inposition on said manifold.

The casing 5 at the upper end thereof and in longitudinal alinement withthe opening 10 is provided with a vertically disposed notch 14communicating at its upper end with the notch 14'. The outlet manifold 8adjacent its lower end is provided with a laterally extended threadedextension 15 ex-...

vertical movement withinthe notch; I

Carried on the extension 15 and disposed against the outer face of thecasing 5 is an elongated plate 16 provided with an opening.intermediateits upper and lower ends for accommodating the extension 15.A retaining nut 17 is threaded on the; extension 15 and bearsagainst'the plate '16 for retaining the same-in contact with the casing5. no

' From the foregoing, it will beseen that I have provided means forutilizing the expansible and contractible qualities of the coil topermit adjustment in the length of thecoil without the necessity ofremoving the coil' and wherebythe coil may be either lengthened orshortened the required distance between thetop and bottom connections ofthe coil with the conventional, pipe fittings, leading to the intakemanifold 9 and the conventional water pipe, leading from the outletmanifold'S. p

Furthermore, it is to be understood that the plate 16 is to be retainedloosely against 7 e the casi'ng'to slide freely parallel-to the easingwhereby, through the natural springiness of the multiple circulatingcoil the same may belengthened or-shortened as required when 1 couplingthe pipe or outlet 8 to the. pipe lead-1.. s 5

ing to the boiler.

Thus, as before stated,-my improvement I permits, because of theflexibility of the coil, the lengthening of the coils, or the shorteningthereof as may be necessaryinmaln ng the connections to the boiler, thisbeing the and slidably contacting the wall of said casing, whereby saidsecond projection may be moved longitudinally of its slotfor expandmg orcontracting the circulating coil to facilitate coupling of the outletmanifold to a conduit pipe of a boiler. a In testimony whereofI aflixvmysignature.

- case in event the riser pipe to the'boiler should fbe out a' trifletoo long or too short.

" Even though I have herein; shown and I described the preferredembodiment of my in- -vention. it is to be understood that the sameis'sus'ceptible to changes fully'com'orehended bvthe spir'itof theinventionas herein described and the scope of the appended claims.

Having thus'described my invention,"wl1at or v '1; In c omblnation. awater heater comprising a casing. said casing having: top and verti--eal side-walls, a notch extending transverselv ofthetop wallof-the'casing and vertically 3 along thervertical wall of the casing atthe top thereof. a resilient water circulating coil f T.arrangedwithin'said'c asingan outlet manifold at the top of thecoil'extnding: through 'thenotch'in the'topof the ca'sin'g,an'eiztenp-sion'nro'videdon the manifold and extending j' I fi through the notchin the vertical wall of the f j casing, said casing adiacentitslower-end being provided witha relatively large opening, 2

an intake manifold for the coil atthe lower i i thereofextending-through said opening. a uplate on the extensionof the intakemanifold, a nut threaded on said extension of the intake adjacent thewall-ofthe casing, and said firstendof'the coil. and having "an'endportion manifold for-securi'ngsaidplate thereon and mentionedextension having a plate arranged jthereon for slidable contact with thewall of the easing, and a nut threaded on the firstposition thereon.-

mentioned extension'for retaining-theplate in 1 v 2 lIncombinatlon. awaterheater including,a casing, a multiple wate'r circulating c011arranged within thef'casin-g and provided with an inlet-manifold andanzoutlet mani- Y 55 fold, andmeans for mounting said coil within 7 Y jthe casing,-said means includingaprojection' 1 1 Y Y providedomsaidinlet'manifold and projectmg through-aslot provided in the 11 ofthe

